... aromatics extraction, acetylene, alkene, diene purification, but also for the polymer solvents. N-methyl-pyrrolidone (NMP) 1. Formula : C5H9NO2. CAS no. .: ... in aromatics extraction, acetylene, alkene, diene purification, but also for the polymer solvents and polymerization medium, such as polyamide, polyimide, polyphenylene ... yellow liquidContent≥99%Water≤0.5% High purity 99% N-methyl-pyrrolidone